[928uk] S4 Overheating - Temp Sensor Operation

[Paul]

For anyone who needs an easy to read diagnostic guide, this is invaluable

https://www.928gt.com/T-WallyHVAC.aspx

However, the method he advises to force the fans to run does not work on my
car, probably because my aircon has lost pressure and is not operational at
the moment

Therefore I made this by taking an old temp sensor, breaking off the brass
section, and twisting the wires together

Then I removed the connector to the radiator temp switch and plugged it in
there, this forces the fans to run with the ignition on

https://thumbsnap.com/i/JCzAYETX.jpg

Paul
87 S4 Manual

On Mon, 21 May 2007 at 11:45, Paul <ukkid35 at gmail.com> wrote:

> Quote from EuroCarParts for:
>
> Rad Sensor (Fan Switch)
> Temp Sensor (I or II - not known)
> Thermostat
>
> £90, but at least they are all in stock. I won't know which temp
> sensor they have, Temp I or Temp II, until I see it though.
>
> Not exactly a bargain, but it's no fun when they're faulty.
>
> Paul
> 87 S4 Manual
>
> On 20/05/07, Paul <ukkid35 at gmail.com> wrote:
> > No sign of it escaping from the overflow hose, but I hope that's where
> it's
> > going - where else could it go?
> >
> > Switching the aircon on seems to keep the temp under control, but there
> was
> > an initial very high reading after about 4 mins driving, which then
> dropped
> > to normal, I'm guessing was when the thermostat opened - perhaps there
> was
> > an air lock.
> >
> > I'm tempted to replace Temp I, Temp II, the Rad sensor and the Thermostat
> > all at once. In the past I would have been more frugal, but for once I
> can
> > aford to be a bit more extravagant.
> >
> > Paul
> > 87 S4 Manual
> >
> >
>